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MMDVM_HS_Dual_Hat Duplex MMDVM Hotspot P25 DMR YSF for Raspberry Pi Revision 1.2


if you need Assembled one , pls click the below link:


Duplex variant of MMDVM_HS_Hat 

This PCB uses the MMDVM_HS . It has two ADF7021 onboard and allows for duplex operation with two time slots on DMR.


Best version on ebay :
 1.Latest version  V1.3, and the firmware is latest 
 2. original cystal :  Original ECS-TXO-3225-147.4-TR from USA


Revision 1.3

An accidentially deleted 3v3 wire has been added back to the PCB layout. BOM, Mouser cart and stencil stay the same as for rev1.2.


- High performance 32-bit ARM processor
- Fully tested
- Supports DMR, P-25,D-Star and System Fusion
- Onboard LEDs to show status (Tx,Rx,PTT,Mode)
- Up to 10mW RF power
- SMA antenna connector,Antenna included
- Mounts cleanly on all current Raspberry Pi's including the Pi Zero
- The firmware is pre-loaded and is easily upgraded via software.
- Open source 3D printable case available
- UHF 430-450 MHz,433mhz and 900MHz

VHF 144 220 Opera FREQ

- Without shell
- Not include the raspberry pi
- The firmware is pre-loaded. if you want update pls Click Updated site

The upper part is TX,the lower is RX antenna.
Modem select:STM32_HS_GPIO
Set TX frequency,RX frequency
TX,RX frequency had better 10M or more apart.
SLOT1,SLOT2 support.

Package List:
- 2 x Antenna + MMDVM HotSPOT Module


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2. Items will be shipped to your eBay address. Please make sure it is correct.

3. Payment must be received 4 days after auction ended.

1. Customer satisfaction is our top goal. We believe our items are so outstanding. All products are quality checked. They are new and in good condition when shipped to our customers. We are convinced you will be happy with your Purchase.

2. If product is defective or damage upon arrival, or wrong product shipped, please contact us immediately. Returns accepted within 14 days of delivery date and item must be in original new condition, not worn or altered in any way with attached tags & wrap. Otherwise deal is final. Return shipping must be paid by buyer. 

3. Please contact us first if you have any problems/questions/concerns. We will be happy to resolve any issues you may have in a cordial and friendly manner.

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If a problem occurs, contact us immediately with any email request. Just contact us using the " Ask the seller a question" link on eBay.